Question

Two trains start from x and y and travel towards y and x respectively. Train from x starts at 7 am and reaches y at 3 pm. While the one from y starts at 9 am and reaches x at 3 pm. At what time will the two trains meet ?pls answer me

Answer 1

Answer:

speed of first train= D/60

speed of second train= D/90

suppose two train will meet after t minutes.

distance travelled by first train in t minutes= t*(D/60)

distance travelled by second train in t minutes= t*(D/90)

distance travelled by both trains= distance between stations

t*(D/60)+t*(D/90)=D

cancel D from both sides

t/60+t/90=1

9 t+6 t=540

15 t= 540

t= 540/15

t=36 minutes

hence answer is 4:36 pm because first train start at 4 pm.